Text Diff Checker

Compare two text blocks with line and word-level highlighting, ignore-case and whitespace options, and inline or side-by-side review.

WORD-LEVEL TEXT DIFF · LOCAL WORKBENCH · BROWSER WORKSPACE

Spot the exact edit. See what stayed the same.

Compare two text blocks with line and word-level highlighting, ignore-case and whitespace options, and inline or side-by-side review.

01 · TEXT VERSIONS3 ↔ 4 LINES

OriginalChanged

Ignore whitespace Ignore case

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Private comparison Both text blocks stay in your browser. Inputs are capped at four million LCS comparison cells to protect the tab.

02 · CHANGE MAPWORD-LEVEL REVIEW

SIMILARITY27.7%

ADDED LINES1

REMOVED LINES0

MODIFIED PAIRS2

Removed AddedChanged words are highlighted inside each paired line.

−The quick brown fox jumps over the lazy dog.

+The quick brown fox leaps over the lazy dog.

−Our refund window is 30 days from delivery.

+Our refund window is 14 days from delivery.

03Support is available Monday to Friday.

+Live chat closes at 6pm.

Similarity counts exact unchanged line content; ignore options affect which lines count as unchanged. It is a revision signal, not a plagiarism score.

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Runs in this browser. Both text blocks are compared in this browser. LCS work is capped at four million comparison cells; large inputs are refused before they can freeze the page.

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Need a feature from the original version? Open the current ECECH tool

How this app works

Compare two text blocks with line and word-level highlighting, ignore-case and whitespace options, and inline or side-by-side review. Results update as you adjust inputs and stay in this browser.